CN113978740A - Double-rotor rim driving type inner and outer duct type propeller for aviation - Google Patents
Double-rotor rim driving type inner and outer duct type propeller for aviation Download PDFInfo
- Publication number
- CN113978740A CN113978740A CN202110409361.1A CN202110409361A CN113978740A CN 113978740 A CN113978740 A CN 113978740A CN 202110409361 A CN202110409361 A CN 202110409361A CN 113978740 A CN113978740 A CN 113978740A
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- China
- Prior art keywords
- duct
- rotor
- ducted
- fan
- propeller
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENTS OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D27/00—Arrangement or mounting of power plant in aircraft; Aircraft characterised thereby
- B64D27/02—Aircraft characterised by the type or position of power plant
- B64D27/24—Aircraft characterised by the type or position of power plant using steam, electricity, or spring force
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/27—Rotor cores with permanent magnets
- H02K1/2706—Inner rotors
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K16/00—Machines with more than one rotor or stator
- H02K16/02—Machines with one stator and two or more rotors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/60—Efficient propulsion technologies, e.g. for aircraft
Abstract
The invention discloses an aviation dual-rotor rim driving type inner and outer duct type propeller which comprises an inner duct conduit, an outer duct conduit, a high-speed dual-rotor rim motor, an inner duct fan and fan supporting structure, an outer duct fan and fan supporting structure, a wing-shaped strut between the inner duct and the outer duct, and a grid wing at the tail of the outer duct. The problem of traditional motor and duct impel the structure can not realize the limitation of inside and outside duct is solved. The inner and outer culvert structures and the winding mode of the special annular winding are adopted to lead the rotating speeds of the inner and outer rotors to be different, thus leading the flow and the flow velocity of the inner and outer culverts to be different and further improving the pneumatic performance of the culvert propeller. The double-rotor inner and outer duct type propeller has the advantages that the motor efficiency and the power density are higher, nearly half of copper loss and iron loss are reduced, the heat dissipation capacity brought by the outer duct is stronger, the absorption loss of a boundary layer caused by the fact that a duct pipe of a traditional rim duct type propeller is too thick is reduced by the outer duct, the outer duct is very thin and is short in the axial direction, and the absorption loss of the boundary layer is very small.
Description
Technical Field
The invention relates to an aviation electric propulsion technology, in particular to an aviation dual-rotor rim-driven inner and outer duct type propeller structure.
Background
With the development and maturity of electric propulsion technology in the low-speed low-altitude field, electric propulsion gradually enters the high-altitude high-speed era. The traditional wheel rim duct propeller meets the requirement of high-altitude and high-speed flight, but has the problems of insufficient power of a single motor, thicker duct conduit, larger absorption loss of a boundary layer than that of the traditional duct and small tension of the duct conduit which is specially driven by a wheel rim. Conventional rim ducted propellers do not have a good solution to the above problems. A scheme for reducing the adsorption loss of the boundary layer of the ducted conduit and improving the power and the overall aerodynamic performance of the motor is required to be found.
Disclosure of Invention
Aiming at the defects of the prior art, the technical problem to be solved by the invention is to provide an aviation dual-rotor rim-driven inner and outer ducted propeller, the propeller is provided based on a traditional rim-driven ducted fan, the ducted structure and the topological structure of a rim motor are further improved, and the propeller is reasonable in design, low in control difficulty, simple to assemble, light in weight, high in adaptability and suitable for high-altitude high-speed propulsion in the aviation field.
The invention adopts the following technical scheme for solving the technical problems:
the dual-rotor rim driving type inner and outer duct type propeller for aviation based on the electric propulsion technology can be arranged below wings, the junction of the wings and a fuselage or the tail area of the fuselage of an aircraft or an airplane, and comprises an inner duct conduit, an outer duct conduit, a dual-rotor rim motor, an inner duct fan and fan supporting structure, an outer duct fan and fan supporting structure, a wing-shaped strut between the inner duct conduit and the outer duct, and a tail grid wing of the outer duct.
According to the scheme, the structure of the double-rotor rim-driven inner and outer duct type propeller for aviation adopts an inner and outer duct nested structure; the outer duct conduit is axially shorter, and the inner duct conduit is axially longer; the distance between the outer duct and the inner duct is smaller than the inner diameter of the inner duct. The windward section of the inner ducted conduit is larger, and the windward section of the outer ducted conduit is smaller.
According to the scheme, the wheel rim driving motor is installed in the inner duct, and the fan of the inner duct is driven by the wheel rim; the fan of the outer duct is driven by a hub. The suction effect of the ducted fan reduces the boundary layer adsorption loss caused by the over-thickness of the traditional wheel rim ducted conduit, and further improves the pneumatic performance of the ducted propeller.
Furthermore, the driving motor adopts an inner and outer double-rotor structure, the inner rotor can adopt a surface-mounted permanent magnet rotor, and can also adopt a squirrel-cage induction motor rotor, and the outer rotor adopts a squirrel-cage induction motor rotor. The inner rotor and the outer rotor are integrated with the blades through blade shroud bands, and the blade shroud bands are made of titanium alloy materials.
Furthermore, the motor stator winding adopts a ring winding mode, and both the inner side and the outer side of the motor stator are provided with grooves. The length of the end part of the motor stator winding is short.
Furthermore, an installation space is reserved between end windings on two axial sides of the motor stator, and the motor stator is fixed in the inner duct conduit. The inner duct wraps the stator and the inner and outer rotors of the rim driving motor.
Furthermore, the inner duct and the outer duct are supported by a wing-shaped edge structure distributed circumferentially at the air inlet, the air outlet of the outer duct is also provided with grid wings distributed circumferentially, and the pressure distribution of the fan sprayed by the outer duct can be changed by changing the grid direction; the grid wings simultaneously play a role in supporting the positions of the inner duct and the outer duct.
Furthermore, the inner rotor and the built-in integrated fan are supported and limited by a support rod at the axial position of the fan, the support rod is fixed on the inner duct conduit through a plurality of prisms at two ends and does not rotate along with the fan, and the fan is sleeved on the support rod through a high-strength bearing; the outer rotor and outer hub blade structure is supported and limited by a segmented fan-shaped high-strength bearing between the outer rotor blade shroud and the outer wall of the inner duct conduit.
Furthermore, the number of the inner and outer slots of the stator is different, the annular winding is wound in a mode of separating turns, the number of poles corresponding to the outer rotor is larger than that of the inner rotor, and therefore the rotating speed of the outer rotor is slower than that of the inner rotor. The rotating speed of the inner rotor is controllable, the outer rotor is correspondingly changed along with the change of the rotating speed of the inner rotor, and the outer rotor has no adjusting capability. The rotating speeds of the inner rotor and the outer rotor are different, so that the flow and the flow speed of the inner duct and the outer duct are different, and the thrust distribution and the size of the propeller are optimized.
The invention has the beneficial effects that:
1. the thrust of the structure of inside and outside duct formula propeller of birotor than traditional rim duct propeller is bigger, and the outer duct pulling force that the interior duct pulling force accounts for than being greater than traditional rim duct and newly-increased far away promptly, and the duct pulling force of traditional rim duct accounts for than very little.
2. The scheme of the double-rotor rim driving type inner and outer duct type propeller structure enables the efficiency and the power density of the rim driving motor to be higher, reduces nearly half of stator copper loss and iron loss, and is stronger in heat dissipation capacity brought by the outer duct, and the stator electric density is also improved.
3. The dual-rotor inner and outer duct type propeller reduces the boundary layer adsorption loss caused by the fact that the duct conduit of the traditional rim duct propeller is too thick by using the outer duct, improves the pneumatic performance, and the added outer duct is thin, short in axial direction, small in surface area and small in boundary layer adsorption loss.
Drawings
Fig. 1 shows an aviation dual-rotor rim-driven inner and outer ducted propeller structure.
Figure 2 is an inside and outside ducted duct structure of the present invention.
Fig. 3 shows a rim drive motor and integrated fan according to the present invention.
Fig. 4 shows the structure of the rim driving motor according to the present invention.
Fig. 5 is a view of the bypass fan support apparatus of the present invention.
Detailed Description
The dual-rotor rim driving type inner and outer duct type propeller for aviation based on the electric propulsion technology can be arranged below wings, the junction of the wings and a fuselage or the tail area of the fuselage of an aircraft or an airplane, and comprises an inner duct conduit, an outer duct conduit, a dual-rotor rim motor, an inner duct fan and fan supporting structure, an outer duct fan and fan supporting structure, a wing-shaped strut between the inner duct conduit and the outer duct, and a tail grid wing of the outer duct.
According to the scheme, the structure of the double-rotor rim-driven inner and outer duct type propeller for aviation adopts an inner and outer duct nested structure; the outer duct conduit is axially shorter, and the inner duct conduit is axially longer; the distance between the outer duct and the inner duct is smaller than the inner diameter of the inner duct. The windward section of the inner ducted conduit is larger, and the windward section of the outer ducted conduit is smaller.
According to the scheme, the wheel rim driving motor is further installed in the inner duct conduit.
Further, the fan of the inner duct is driven by a wheel rim; the fan of the outer duct is driven by a hub.
Furthermore, the driving motor adopts an inner and outer double-rotor structure, the inner rotor can adopt a surface-mounted permanent magnet rotor, and can also adopt a squirrel-cage induction motor rotor, and the outer rotor adopts a squirrel-cage induction motor rotor. The inner rotor and the outer rotor are integrated with the blades through blade shroud bands, and the blade shroud bands are made of titanium alloy materials.
Furthermore, the motor stator winding adopts a ring winding mode, and both the inner side and the outer side of the motor stator are provided with grooves. The motor stator winding ends are small.
Furthermore, an installation space is reserved between end windings on two axial sides of the motor stator, and the motor stator is fixed in the inner duct conduit. The inner duct wraps the stator and the inner and outer rotors of the rim driving motor.
Furthermore, the inner duct and the outer duct are supported by a wing-shaped edge structure distributed circumferentially at the air inlet, the air outlet of the outer duct is also provided with grid wings distributed circumferentially, and the pressure distribution of the fan sprayed by the outer duct can be changed by changing the grid direction; the grid wings simultaneously play a role in supporting the positions of the inner duct and the outer duct.
Furthermore, the inner rotor and the built-in integrated fan are supported and limited by a support rod at the axial position of the fan, the support rod is fixed on the inner duct conduit through a plurality of prisms at two ends and does not rotate along with the fan, and the fan is sleeved on the support rod through a high-strength bearing; the outer rotor and outer hub blade structure is supported and limited by a segmented fan-shaped high-strength bearing between the outer rotor blade shroud and the outer wall of the inner duct conduit.
Furthermore, the number of the inner and outer slots of the stator is different, the annular winding is wound in a mode of separating turns, the number of poles corresponding to the outer rotor is larger than that of the inner rotor, and therefore the rotating speed of the outer rotor is slower than that of the inner rotor. The rotating speed of the inner rotor is controllable, the outer rotor is correspondingly changed along with the change of the rotating speed of the inner rotor, and the outer rotor has no adjusting capability.
The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.
As shown in fig. 1, the aviation dual-rotor rim-driven inner and outer ducted propeller structure according to the present invention includes the following components: the device comprises an outer duct conduit 11, an inner duct conduit 12, a rim driving motor 13, a built-in fan supporting and limiting device 18, and a supporting structure 21 between an outer hub integrated fan blade shroud and the outer wall of an inner duct.
As shown in fig. 2, the inner and outer ducted conduit structure further comprises a supporting rib structure 19 between the inner and outer ducts and a grid wing structure 20 at the tail of the outer duct, which are circumferentially distributed in the duct gap, for supporting the distance between the outer ducted conduit 11 and the inner ducted conduit 12. The grid wing structure at the tail part of the outer duct also has the function of adjusting the air injection distribution of the outer duct, and the wake flow distribution condition of the propeller can be changed by changing the deflection angle of the grid wings in the processes of taking off, landing and accelerating and decelerating.
Fig. 3 shows a structural diagram of a rim motor and an integrated fan, including: an internal integrated fan blade shroud 14, an internal integrated fan blade 15, an outer hub integrated fan blade shroud 16, and an outer hub integrated fan blade 17. The fan 15 of the inner duct is driven by a wheel rim; the ducted fan 17 is driven by a hub.
As shown in fig. 4, a structure diagram of the rim driving motor 13 of the inner and outer double rotor structure includes: stator 131, stator windings 132, outer rotor 133, and inner rotor 134. The inner rotor 134 may be a surface-mounted permanent magnet rotor, or may be a squirrel-cage induction motor rotor, and the outer rotor 133 may be a squirrel-cage induction motor rotor. The inner rotor and the outer rotor are integrated with the blades through blade shroud bands, the motor stator winding 132 adopts a ring winding mode, and the inner side and the outer side of the motor stator are both provided with grooves. The motor stator winding 132 ends are small. The number of the inner and outer grooves of the stator is different, the annular winding is wound in a mode of separating turns, the number of poles corresponding to the outer rotor is larger than that of the inner rotor, and therefore the rotating speed of the outer rotor is slower than that of the inner rotor. The rotating speed of the inner rotor is controllable, the outer rotor is correspondingly changed along with the change of the rotating speed of the inner rotor, and the outer rotor has no adjusting capability. The stator 131, the outer rotor 133 and the inner rotor 134 of the rim drive motor 13 and the blade shrouds 14 are completely enclosed by the inner duct 12, and the blade shrouds 16 of the outer rotor are not completely enclosed by the duct 12. The blade shroud is made of titanium alloy material. And an installation space is reserved between the end windings on two axial sides of the motor stator, and the motor stator is fixed in the inner duct conduit.
As shown in fig. 1 and 5, the inner rotor 134 and the built-in integrated fans 14 and 15 are supported and limited by the support rods 18 at the axial positions of the fans, the support rods are fixed on the inner duct conduit through a plurality of prisms at two ends and do not rotate with the fans, and the fans are sleeved on the support rods through high-strength bearings; the outer rotor 133 and outer hub blade structure 16, 17 are supported and restrained by segmented fan-shaped high strength bearings 21 between the outer rotor blade shrouds and the outer wall of the inner duct ducts.
The scheme of the double-rotor rim driving type inner and outer duct type propeller structure for aviation solves the limitation that the inner and outer ducts cannot be realized by the traditional motor and duct propulsion structure. The inner and outer culvert structures and the winding mode of the special annular winding are adopted, so that the rotating speeds of the inner and outer rotors are different, the flow and the flow velocities of the inner and outer culverts are different, the pneumatic performance of the culvert propeller is further improved, and the culvert propeller has wide application prospects in the fields of aviation electric propulsion and vertical take-off and landing.
The above-mentioned embodiments, objects, technical solutions and advantages of the present invention are further described in detail, it should be understood that the above-mentioned embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The inside and outside duct formula propeller of birotor rim drive of aviation usefulness, its characterized in that: the high-speed dual-rotor wheel-rim motor type ducted fan comprises an inner ducted duct and an outer ducted duct, a high-speed dual-rotor wheel-rim motor, an inner ducted fan and fan supporting structure, an outer ducted fan and fan supporting structure, a wing-shaped strut between the inner ducted duct and the outer ducted duct, and a grid wing at the tail of the outer ducted duct.
2. The dual rotor rim driven endo-ducted aero propeller as set forth in claim 1, wherein: the propeller adopts an inner and outer duct structure, the outer duct conduit is shorter, the inner duct conduit is longer, and the distance between the outer duct and the inner duct is smaller than the inner diameter of the inner duct conduit; the windward section of the inner ducted conduit is larger, and the windward section of the outer ducted conduit is smaller.
3. The dual rotor rim driven endo-ducted aero propeller as set forth in claim 1, wherein: the rim driving motor is arranged in the inner duct conduit; the fan of the inner duct is driven by a wheel rim; the fan of the outer duct is driven by a hub.
4. The dual rotor rim driven endo-ducted aero propeller as set forth in claim 1, wherein: the driving motor adopts an inner and outer double-rotor structure, the inner rotor can adopt a surface-mounted permanent magnet rotor, and can also adopt a squirrel-cage induction motor rotor, and the outer rotor adopts a squirrel-cage induction motor rotor; the inner rotor and the outer rotor are integrated with the blades through blade shroud bands, and the blade shroud bands are made of titanium alloy materials.
5. The dual rotor rim driven endo-ducted aero propeller as set forth in claim 3, wherein: the motor stator winding adopts a ring winding mode, and the inner side and the outer side of the motor stator are both provided with grooves; the length of the end part of the motor stator winding is short.
6. The dual rotor rim driven endo-ducted aero propeller as set forth in claim 3, wherein: an installation space is reserved between the end windings on two axial sides of the motor stator, and the motor stator is fixed in the inner duct conduit; the inner duct wraps the stator and the inner and outer rotors of the rim driving motor.
7. The dual rotor rim driven endo-ducted aero propeller as set forth in claim 1, wherein: the inner duct and the outer duct are supported by a wing-shaped edge structure distributed circumferentially at the air inlet, the air outlet of the outer duct is also provided with grid wings distributed circumferentially, and the pressure distribution of the fan for spraying air by the outer duct can be changed by changing the grid direction; the grid wings simultaneously play a role in supporting the positions of the inner duct and the outer duct.
8. The aero dual rotor rim driven inner and outer ducted propeller as claimed in claim 1, wherein: the inner rotor and the built-in integrated fan are supported and limited by a support rod at the axial position of the fan, the support rod is fixed on the inner duct conduit through a plurality of prisms at two ends and does not rotate along with the fan, and the fan is sleeved on the support rod through a high-strength bearing; the outer rotor and outer hub blade structure is supported and limited by a segmented fan-shaped high-strength bearing between the outer rotor blade shroud and the inner duct conduit.
9. The dual rotor rim driven endo-ducted aero propeller as set forth in claim 1, wherein: the stator annular winding adopts a non-one-to-one corresponding turn number separated winding mode according to different numbers of the inner and outer slots, and the number of corresponding poles of the outer rotor is larger than that of the inner rotor, so that the rotating speed of the outer rotor is slower than that of the inner rotor; the rotating speed of the inner rotor is controllable, the outer rotor is correspondingly changed along with the change of the rotating speed of the inner rotor, and the outer rotor has no adjusting capability.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110409361.1A CN113978740B (en) | 2021-04-16 | 2021-04-16 | Double-rotor rim-driven inner and outer duct type propeller for aviation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110409361.1A CN113978740B (en) | 2021-04-16 | 2021-04-16 | Double-rotor rim-driven inner and outer duct type propeller for aviation |
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| Publication Number | Publication Date |
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| CN113978740A true CN113978740A (en) | 2022-01-28 |
| CN113978740B CN113978740B (en) | 2022-11-11 |
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| CN202110409361.1A Active CN113978740B (en) | 2021-04-16 | 2021-04-16 | Double-rotor rim-driven inner and outer duct type propeller for aviation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114313219A (en) * | 2022-02-18 | 2022-04-12 | 南京航空航天大学 | Novel contra-rotating fan propulsion structure |
| WO2024001143A1 (en) * | 2022-06-30 | 2024-01-04 | 亿航智能设备（广州）有限公司 | Ducted fan, aircraft and attitude control method and device therefor, and related apparatus |
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| CN104481696A (en) * | 2014-12-05 | 2015-04-01 | 南昌航空大学 | Contra-rotating outer framework water-air dual-purpose engine |
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| CN105366060A (en) * | 2015-12-03 | 2016-03-02 | 北京航空航天大学 | Lightweight high efficiency low noise duct type four-level electric fan propeller |
| CN107804452A (en) * | 2017-11-30 | 2018-03-16 | 肖华清 | Culvert type large-caliber spiral oar |
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| US5653404A (en) * | 1995-04-17 | 1997-08-05 | Ploshkin; Gennady | Disc-shaped submersible aircraft |
| US20100264256A1 (en) * | 2009-04-16 | 2010-10-21 | The Trustees Of The University Of Pennsylvania | Counter-rotational inertial control of rotorcraft |
| CN104481696A (en) * | 2014-12-05 | 2015-04-01 | 南昌航空大学 | Contra-rotating outer framework water-air dual-purpose engine |
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| Publication number | Publication date |
|---|---|
| CN113978740B (en) | 2022-11-11 |
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